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WO2004002491A1 - Derives de morpholine et de tetrahydropyrane et leur utilisation en tant qu'inhibiteurs de cathepsine - Google Patents

Derives de morpholine et de tetrahydropyrane et leur utilisation en tant qu'inhibiteurs de cathepsine Download PDF

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Publication number
WO2004002491A1
WO2004002491A1 PCT/US2003/019960 US0319960W WO2004002491A1 WO 2004002491 A1 WO2004002491 A1 WO 2004002491A1 US 0319960 W US0319960 W US 0319960W WO 2004002491 A1 WO2004002491 A1 WO 2004002491A1
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Prior art keywords
oxo
moφholin
carbonyl
ethyl
propyl
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Ceased
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PCT/US2003/019960
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WO2004002491A8 (fr
Inventor
Michael Graupe
James T. Palmer
John W. Patterson
Stephen D. Pickett
David J. Aldous
Sukanthini Thurairatnam
Andreas P. Timm
Frank Halley
Justine Lai
John Link
Jiayao Li
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Axys Pharmaceuticals Inc
Aventis Pharmaceuticals Inc
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Axys Pharmaceuticals Inc
Aventis Pharmaceuticals Inc
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Priority to AU2003245668A priority Critical patent/AU2003245668A1/en
Priority to CA002488525A priority patent/CA2488525A1/fr
Priority to JP2004517794A priority patent/JP2006512289A/ja
Priority to EP03739296A priority patent/EP1515726A1/fr
Publication of WO2004002491A1 publication Critical patent/WO2004002491A1/fr
Anticipated expiration legal-status Critical
Publication of WO2004002491A8 publication Critical patent/WO2004002491A8/fr
Ceased legal-status Critical Current

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    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/24—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with substituted hydrocarbon radicals attached to ring carbon atoms
    • C07D213/36—Radicals substituted by singly-bound nitrogen atoms
    • C07D213/40—Acylated substituent nitrogen atom
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    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/41—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with two or more ring hetero atoms, at least one of which being nitrogen, e.g. tetrazole
    • A61K31/4245—Oxadiazoles
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    • A61K31/535—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and one oxygen as the ring hetero atoms, e.g. 1,2-oxazines
    • A61K31/5375—1,4-Oxazines, e.g. morpholine
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    • A61K31/5375—1,4-Oxazines, e.g. morpholine
    • A61K31/5377—1,4-Oxazines, e.g. morpholine not condensed and containing further heterocyclic rings, e.g. timolol
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    • A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
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    • C07C323/60—Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups containing thio groups and carboxyl groups bound to the same carbon skeleton having the sulfur atoms of the thio groups bound to acyclic carbon atoms of the carbon skeleton with the carbon atom of at least one of the carboxyl groups bound to nitrogen atoms
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    • C07D205/06—Heterocyclic compounds containing four-membered rings with one nitrogen atom as the only ring hetero atom not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
    • C07D205/08—Heterocyclic compounds containing four-membered rings with one nitrogen atom as the only ring hetero atom not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with one oxygen atom directly attached in position 2, e.g. beta-lactams
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    • C07D207/02—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D207/18—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having one double bond between ring members or between a ring member and a non-ring member
    • C07D207/22—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having one double bond between ring members or between a ring member and a non-ring member with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
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    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D213/72—Nitrogen atoms
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    • C07D223/02—Heterocyclic compounds containing seven-membered rings having one nitrogen atom as the only ring hetero atom not condensed with other rings
    • C07D223/06—Heterocyclic compounds containing seven-membered rings having one nitrogen atom as the only ring hetero atom not condensed with other rings with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
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    • C07D263/30—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
    • C07D263/32—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
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    • C07D263/54—Benzoxazoles; Hydrogenated benzoxazoles
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    • C07D271/02—Heterocyclic compounds containing five-membered rings having two nitrogen atoms and one oxygen atom as the only ring hetero atoms not condensed with other rings
    • C07D271/06—1,2,4-Oxadiazoles; Hydrogenated 1,2,4-oxadiazoles
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    • C07D271/02—Heterocyclic compounds containing five-membered rings having two nitrogen atoms and one oxygen atom as the only ring hetero atoms not condensed with other rings
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    • C07D277/20—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
    • C07D277/22—Heterocyclic compounds containing 1,3-thiazole or hydrogenated 1,3-thiazole rings not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms
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    • C07D295/16—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms acylated on ring nitrogen atoms
    • C07D295/18—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms acylated on ring nitrogen atoms by radicals derived from carboxylic acids, or sulfur or nitrogen analogues thereof
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Definitions

  • This application relates to compounds and compositions for treating diseases associated with cysteine protease activity, particularly diseases associated with activity of cathepsin S and the processes of making the compounds.
  • Cysteine proteases represent a class of peptidases characterized by the presence of a cysteine residue in the catalytic site of the enzyme. Cysteine proteases are associated with the normal degradation and processing of proteins. The aberrant activity of cysteine proteases, e.g., as a result of increased expression or enhanced activation, however, may have pathological consequences. In this regard, certain cysteine proteases are associated with a number of disease states, including arthritis, muscular dystrophy, inflammation, tumor invasion, glomerulonephritis, malaria, periodontal disease, metachromatic leukodystrophy and others. An increase in cathepsin S activity contributes to the pathology and/or symptomatology of a number of diseases. Accordingly, molecules that inhibit the activity of cathepsin S protease are useful as therapeutic agents in the treatment of such diseases.
  • This application relates to compounds that inhibit the enzymatic activity of Cathapsin S and have a backbone structure of formula I, ⁇ or HI:
  • a 1 is -O-, -N(R)- or -SO 2 - ;
  • a 2 is -H, -F, -OH, or -O-R;
  • a 3 is -C(O)-X 3 or cyano; and
  • X 2 , X 3 , X 4 , X 5 , X 7 and R are chemical groups or radicals.
  • the compounds of the present invention also include closely related isomers and derivatives that are made from the compounds of the above Formulae. They include, but not limited to, the N-oxide derivatives, prodrug derivatives, protected derivatives, individual isomers and mixture of isomers of the compounds, and the pharmaceutically acceptable salts and solvates of such compounds.
  • a related chemical entity of Formula I, ⁇ or HI means an ⁇ -oxide derivative, a produg derivative, a protected derivative, an individual isomer, a mixture of isomers, or a pharmaceutically acceptable salt or solvate, of a compound of Formula I, LT or HI.
  • the inventive point is the backbone structures of Formulae I and II themselves, wherein the substituents at the X 2 , X 3 , X 4 , X 5 and X 7 positions can be any chemical groups or radicals which may be substituted at those positions (or general substituents as defined hereinafter), including those substitutions made possible by any conventional means or by any new technologies developed in the future.
  • substituents stated in a claim that does not serve as a claim element or limitation of the claim is referred to as a "general substituents.”
  • the inventive point is the backbone structures of Formula I and II plus popular substituents at the X 2 , X 3 , X 4 , X 5 and X 7 positions.
  • a popular substituent means a chemical group or radical which people of ordinary skill in the art, by using the specific substitutions disclosed hereinafter as guidance, would deem practical to substitute at X 2 , X 3 , X 4 , X 5 or X 7 without undue experimentation in practicing the present invention.
  • the inventive point is the backbone structures of Formula I and II plus popular substituents at the X 2 , X 3 , X 4 , X 5 and X 7 positions.
  • a popular substituent means a chemical group or radical which people of ordinary skill in the art, by using the specific substitutions disclosed hereinafter as guidance, would deem practical to substitute at X 2 , X 3 , X 4 , X 5 or X 7 without undue experimentation in practicing the present invention.
  • the inventive point is the backbone structures
  • Another aspect of the invention is a compound of Formula HI, wherein A 1 is -O-, - N(R)- or -SO 2 -, A 2 is -H, -F, -OH, or -O-R, A 3 is cyano or -C(O)-X 3 , and X 2 , X 3 , X 4 , X 7 and R are general substituents.
  • Another aspect of the invention is a method for treating a disease in an animal in which inhibition of cathepsin S can prevent, inhibit or ameliorate the pathology and/or symptomatology of the disease, which method comprises administering to the animal a therapeutically effective amount of a compound of the present invention.
  • Another aspect of the invention are the processes for preparing compounds of Formulae I, H and m.
  • a “racemic mixture” contains both enantiomers as a 1 : 1 ratio. However, in terms of this application a racemic mixture has been employed when both enantiomers were present irrespective of their ratios.
  • a compound that has more than one chiral center has 2" "1 enantiomeric pairs, where n is the number of chiral centers. Compounds with more than one chiral center may exist as either an individual diastereomer or as a mixture of diastereomers, termed a "diastereomeric mixture". When one chiral center is present a stereoisomer may be characterized by the absolute configuration of that chiral center. Absolute configuration refers to the arrangement in space of the substituents attached to the chiral center.
  • Enantiomers are characterized by the absolute configuration of their chiral centers and described by the R- and S-sequencing rules of Cahn, Ingold and Prelog. Conventions for stereochemical nomenclature, methods for the determination of stereochemistry and the separation of stereoisomers are well known in the art (e.g., see “Advanced Organic Chemistry", 4th edition, March, Jerry, John Wiley & Sons, New York, 1992). It is understood that the names and illustrations used in this disclosure to describe compounds of Formulae I, H, and HI are meant to encompass all possible stereoisomers.
  • 2-cyclohexylmethyl-N-[l-(5- ethyl-l,2,4-oxadiazole-3-carbonyl)-propyl]-4-morpholin-4-yl-4-oxo-butyramide is meant to include (R)-2-cyclohexylmethyl-N-[(S)-l -(5-ethyl-l ,2,4-oxadiazole-3-carbonyl)-propyl]-4- morpholin-4-yl-4-oxo-butyramide and (S)-2-Cyclohexylmethyl-N-[(R)-l -(5-ethyl-l, 2,4- oxadiazole-3-carbonyl)-propyl]-4-mo holin-4-yI-4-oxo-butyramide and any mixture, racemic or otherwise, thereof.
  • N-oxide derivatives means derivatives of compounds of Formulae I, H and HI in which nitrogens are in an oxidized state (i.e., ⁇ -O) and which possess the desired pharmacological activity.
  • “Pharmaceutically acceptable” means that which is useful in preparing a pharmaceutical composition that is generally safe, non-toxic and neither biologically nor otherwise undesirable and includes that which is acceptable for veterinary use as well as human pharmaceutical use.
  • “Pharmaceutically acceptable salts” means salts of compounds of Formulae I, H and HI which are pharmaceutically acceptable, as defined above, and which possess the desired pharmacological activity.
  • Such salts include acid addition salts formed with inorganic acids such as hydrochloric acid, hydrobromic acid, sulfuric acid, nitric acid, phosphoric acid, and the like; or with organic acids such as acetic acid, propionic acid, hexanoic acid, heptanoic acid, cyclopentanepropionic acid, glycolic acid, pyruvic acid, lactic acid, malonic acid, succinic acid, malic acid, maleic acid, fumaric acid, tartaric acid, citric acid, benzoic acid, o-(4-hydroxybenzoyl)benzoic acid, cinnamic acid, mandelic acid, methylsulfonic acid, ethanesulfonic acid, 1,2-ethanedisulfonic acid, 2-hydroxyethanesulfonic acid, benzenesulfonic acid, j-chlorobenzenesulfonic acid, 2-naphthalenesulfonic acid, j-toluen
  • Pharmaceutically acceptable salts also include base addition salts which may be formed when acidic protons present are capable of reacting with inorganic or organic bases.
  • Acceptable inorganic bases include sodium hydroxide, sodium carbonate, potassium hydroxide, aluminum hydroxide and calcium hydroxide.
  • Acceptable organic bases include ethanolamine, diethanolamine, triethanolamine, tromethamine, N-methylglucamine and the like.
  • Prodrug means a compound which is convertible in vivo by metabolic means to a compound of Formula I, H or HI.
  • an ester of a compound of Formula I, H or HI containing a hydroxy group may be convertible by hydrolysis in vivo to the parent molecule.
  • an ester of a compound of Formula I, H or HI containing a carboxy group may be convertible by hydrolysis in vivo to the parent molecule.
  • Suitable esters of compounds of Formulae I , H and HI containing a hydroxy group are for example acetates, citrates, lactates, tartrates, malonates, oxalates, salicylates, propionates, succinates, fumarates, maleates, methylene- bis-b-hydroxynaphthoates, gentisates, isethionates, di- ⁇ -toluoyltartrates, methylsulphonates, ethanesulphonates, benzenesulphonates, p-toluenesulphonates, cyclohexylsulphamates and quinates.
  • Suitable esters of compounds of Formulae I, H and HI containing a carboxy group are, for example, those described by F.J.Leinweber, Drug Metab. Res., 1987, 18, page 379.
  • An especially useful class of esters of compounds of Formulae I, H and HI containing a hydroxy group may be formed from acid moieties selected from those described by Bundgaard et al., J. Med.
  • substituted (aminomethyl)-benzoates for example, dialkylamino-methylbenzoates in which the two alkyl groups may be joined together and/or interrupted by an oxygen atom or by an optionally substituted nitrogen atom, e.g., an alkylated nitrogen atom, more especially (morpholino-methyl)benzoates, e.g., 3- or 4-(morpholinomethy ⁇ )-benzoates, and (4-alkylpiperazin-l-yl)benzoates, e.g., 3- or 4-(4-alkylpiperazin- 1 -yl)benzoates.
  • substituted (aminomethyl)-benzoates for example, dialkylamino-methylbenzoates in which the two alkyl groups may be joined together and/or interrupted by an oxygen atom or by an optionally substituted nitrogen atom, e.g., an alkylated nitrogen atom, more especially (morpholino-methyl)benzoates, e.g., 3- or 4-(morpholin
  • Protected derivatives means derivatives of compounds of Formulae I, II and in in which a reactive site or sites are blocked with protecting groups.
  • Protected derivatives of compounds of Formulae I, H and HI are useful in the preparation of compounds of Formulae I, H and HI or in themselves may be active cathepsin S inhibitors.
  • a comprehensive list of suitable protecting groups can be found in T.W. Greene, Protecting Groups in Organic Synthesis, 3rd edition, John
  • “Therapeutically effective amount” means that amount which, when administered to an animal for treating a disease, is sufficient to effect such treatment for the disease.
  • Treatment or “treating” means any administration of a compound of the present invention and includes:
  • One particular group of compounds are compounds of Formulae I, H and HI,
  • X is a substituted alkyl motif or a sulfonyl alkyl motif
  • X 3 is a heterocyclic motif or an amide motif
  • X 4 and X 7 are independently -H, -R or , or X 4 and X 7 taken together with the carbon atom to which both X 4 and X 7 are attached form a 3-6 membered cycloalkyl group;
  • X 5 is -H, -F, -OH or-O-R;
  • a 1 is -O-, -N(R)- or -SO 2 - ;
  • a 2 is -H, -F, -OH, or -O-R;
  • a 3 is cyano or -C(O)-X 3 ;
  • R is an alkyl group with straight or branched-chain containing 1-6 carbon atoms.
  • heterocyclic motif is:
  • a substituted alkyl motif is:
  • a sulfonyl alkyl motif is:
  • This group of preferred embodiments also encompasses their related chemcial entities as defined above.
  • the compounds of the invention are inhibitors of cathepsin S and, as such, are useful for treating diseases in which cathepsin S activity contributes to the pathology and/or symptomatology of the disease.
  • the compounds of the invention may be useful in treating autoimmune disorders, including, but not limited to, juvenile onset diabetes, multiple sclerosis, pemphigus vulgaris, Graves' disease, myasthenia gravis, systemic lupus erythemotasus, irritable bowel disease, rheumatoid arthritis and Hashimoto's thyroiditis, allergic disorders including but not limited to, asthma, and allogeneic immune responses, including, but not limited to, organ transplants or tissue grafts.
  • Cathepsin S is also implicated in disorders involving excessive elastolysis, such as chronic obstructive pulmonary disease (e.g., emphysema), bronchiolitis, excessive airway elastolysis in asthma and bronchitis, pneumonities and cardiovascular disease such as plaque rupture and atheroma.
  • Cathepsin S is implicated in fibril formation and, therefore, inhibitors of cathepsins S may be of use in treatment of systemic amyloidosis.
  • cysteine protease inhibitory activities of the compounds of the invention can be determined by methods known to those of ordinary skill in the art. Suitable in vitro assays for measuring protease activity and the inhibition thereof by test compounds are known. Typically, the assay measures protease-induced hydrolysis of a peptide-based substrate. Details of assays for measuring protease inhibitory activity are set forth in Examples 46, 47, 48, 49, infra.
  • compositions In general, compounds of the present invention will be administered in therapeutically effective amounts via any of the usual and acceptable modes known in the art, either singly or in combination with one or more therapeutic agents.
  • a therapeutically effective amount may vary widely depending on the severity of the disease, the age and relative health of the subject, the potency of the compound used and other factors.
  • therapeutically effective amounts of a compound of the invention may range from about 1 micrograms per kilogram body weight ( ⁇ g/kg) per day to about 60 milligram per kilogram body weight (mg/kg) per day, typically from about 1 ⁇ g/kg/day to about 20 mg/kg/day.
  • a therapeutically effective amount for a 80 kg human patient may range from about 80 ⁇ g/day to about 4.8 g/day, typically from about 80 ⁇ g/day to about 1.6 g/day.
  • the compounds of the invention can be administered as pharmaceutical compositions by one of the following routes: oral, systemic (e.g., transdermal, intranasal or by suppository) or parenteral (e.g., intramuscular, intravenous or subcutaneous).
  • compositions can take the form of tablets, pills, capsules, semisolids, powders, sustained release formulations, solutions, suspensions, elixirs, aerosols, or any other appropriate composition and are comprised of, in general, a compound of the invention in combination with at least one pharmaceutically acceptable excipient.
  • Acceptable excipients are non-toxic, aid administration, and do not adversely affect the therapeutic benefit of the active ingredient.
  • excipient maybe any solid, liquid, semisolid or, in the case of an aerosol composition, gaseous excipient that is generally available to one of skill in the art.
  • Solid pharmaceutical excipients include starch, cellulose, talc, glucose, lactose, sucrose, gelatin, malt, rice, flour, chalk, silica gel, magnesium stearate, sodium stearate, glycerol monostearate, sodium chloride, dried skim milk, and the like.
  • Liquid and semisolid excipients may be selected from water, ethanol, glycerol, propylene glycol and various oils, including those of petroleum, animal, vegetable or synthetic origin (e.g., peanut oil, soybean oil, mineral oil, sesame oil, and the like).
  • Preferred liquid carriers, particularly for injectable solutions include water, saline, aqueous dextrose and glycols.
  • a composition of a compound of the invention for treating a given disease will comprise from 0.01%w to 10%w, preferably 0.3%w to l%w, of active ingredient with the remainder being the excipient or excipients.
  • the pharmaceutical composition is administered in a single unit dosage form for continuous treatment or in a single unit dosage form ad libitum when relief of symptoms is specifically required.
  • Representative pharmaceutical formulations containing a compound of the invention are described in Example 50.
  • compounds of Formula I can be prepared by condensing an acid of Formula 2 with an amino compound of the formula NH 2 CX X 7 -C(O)-X 3 .
  • the condensation reaction can be effected with an appropriate coupling agent (e.g., benzotriazol-1 -yloxytrispyrrolidinophosphonium hexafluorophosphate (PyBOP ® ), l-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDCI), O-benzotriazol-1-yl- NNN' ⁇ V'-tetramethyluronium hexafluorophosphate (HBTU), 1,3-dicyclohexylcarbodiimide (DCC), 0-(7-azabenzotrizol- 1 -yl)- 1 , 1 ,3 ,3 , tetra-methyluroniumhexafluorophosphate (HATU), or the like
  • the condensation reaction can be effected with an appropriate coupling agent as above and the oxidation step can be carried out with an oxidizing agent (e.g. Dess-Martin Periodinane or Sodium hypochlorite and TEMPO) in a suitable solvent at ambient temperature.
  • an oxidizing agent e.g. Dess-Martin Periodinane or Sodium hypochlorite and TEMPO
  • a suitable solvent at ambient temperature.
  • an oxidizing agent e.g. Dess-Martin Periodinane or Sodium hypochlorite and TEMPO
  • reaction involves alkylation followed by alkaline hydrolysis at a temperature during which the dicarboxylic acid formed undergoes mono-decarboxylation.
  • decarbalkoxylation can be effected under strongly basic conditions (e.g. in the presence of IN aqueous sodium hydroxide) in a suitable solvent (e.g. ethanol).
  • Ry is, for example, benzyl, iso-butyl, cyclopropylmethyl.
  • Ry is not limited to the examples provided.
  • Other substituents at Ry may also provide satisfactory results, and those sastisfactory substituents are referred to as "equivalent substituents" for the pu ⁇ ose of this application.
  • compounds 2 can be resolved as their individual stereoisomers by chiral HPLC or by reacting a racemic mixture of the compound with an optically active resolving agent to form a pair of diastereoisomeric compounds, separating the diastereomers and recovering the optically pure enantiomer.
  • Diastereomers have distinct physical properties (e.g., melting points, boiling points, solubilities, reactivity, etc.) and can be readily separated by taking advantage of these dissimilarities.
  • the diastereomers can be separated by separation/resolution techniques based upon differences in solubility. A more detailed description of the techniques applicable to the resolution of stereoisomers of compounds from their racemic mixture can be found in Jean Jacques Andre Collet, Samuel H. Wilen, Enantiomers, Racemates and Resolutions, John Wiley & Sons, Inc. (1981).
  • a compound of Formula I, H or IH can be prepared as a pharmaceutically acceptable acid addition salt by reacting the free base form of the compound with a pharmaceutically acceptable inorganic or organic acid.
  • a pharmaceutically acceptable base addition salt of a compound of Formula I, H or IH can be prepared by reacting the free acid form of the compound with a pharmaceutically acceptable inorganic or organic base.
  • Inorganic and organic acids and bases suitable for the preparation of the pharmaceutically acceptable salts of compounds of Formulae I, H and HI are set forth in the definitions section of this Application.
  • the salt forms of the compounds of Formulae I, H and HI can be prepared using salts of the starting materials or intermediates.
  • the free acid or free base forms of the compounds of Formulae I, H and HI can be prepared from the corresponding base addition salt or acid addition salt form.
  • a compound of Formula I, H or HI in an acid addition salt form can be converted to the corresponding free base by treating with a suitable base (e.g., ammonium hydroxide solution, sodium hydroxide, and the like).
  • a suitable base e.g., ammonium hydroxide solution, sodium hydroxide, and the like.
  • a compound of Formula I, H or HI in a base addition salt form can be converted to the corresponding free acid by treating with a suitable acid (e.g., hydrochloric acid, etc).
  • N-oxides of compounds of Formulae I, H and HI can be prepared by methods known to those of ordinary skill in the art.
  • N-oxides can be prepared by treating an unoxidized form of the compound of Formula I, H or HI with an oxidizing agent (e.g., trifluoroperacetic acid, permaleic acid, perbenzoic acid, peracetic acid, wet -chloroperoxybenzoic acid, or the like) in a suitable inert organic solvent (e.g., a halogenated hydrocarbon such as dichloromethane) at approximately 0°C.
  • an oxidizing agent e.g., trifluoroperacetic acid, permaleic acid, perbenzoic acid, peracetic acid, wet -chloroperoxybenzoic acid, or the like
  • a suitable inert organic solvent e.g., a halogenated hydrocarbon such as dichloromethane
  • Compounds of Formulae I, H and HI in unoxidized form can be prepared from N-oxides of compounds of Formulae I, ⁇ and in by treating with a reducing agent (e.g., sulfur, sulfur dioxide, triphenyl phosphine, lithium borohydride, sodium borohydride, phosphorus trichloride, tribromide, or the like) in an suitable inert organic solvent (e.g., acetonitrile, ethanol, aqueous dioxane, or the like) at 0 to 80°C.
  • a reducing agent e.g., sulfur, sulfur dioxide, triphenyl phosphine, lithium borohydride, sodium borohydride, phosphorus trichloride, tribromide, or the like
  • an inert organic solvent e.g., acetonitrile, ethanol, aqueous dioxane, or the like
  • Prodrug derivatives of the compounds of Formulae I, H and IH can be prepared by methods known to those of ordinary skill in the art (e.g., for further details see Saulnier et ⁇ /.(1994), Bioorganic and Medicinal Chemistry Letters, Vol.4, p. 1985).
  • appropriate prodrugs can be prepared by reacting a non-derivatized compound of Formula I, H or IH with a suitable carbamylating agent (e.g., 1 ,l-acyloxyalkylcarbonochloridate, > ⁇ r ⁇ -r ⁇ trophenyl carbonate, or the like).
  • Protected derivatives of the compounds of Formulae I, H and HI can be made by means known to those of ordinary skill in the art. A detailed description of the techniques applicable to the creation of protecting groups and their removal can be found in T.W. Greene, Protecting Groups in Organic Synthesis, 3 rd edition, John Wiley & Sons, Inc. 1999.
  • Hydrates of compounds of the present invention may be conveniently prepared, or formed during the process of practicing the invention, as solvates (e.g. hydrates). Hydrates of compounds of the present invention may be conveniently prepared by recrystallisation from an aqueous/organic solvent mixture, using organic solvents such as dioxane, tetrahydrofuran or methanol.
  • the present invention is further exemplified, but not limited by, the following examples that illustrate the preparation of the compounds of the present invention (Examples) and their corresponding intermediates (References). These specifically exemplified embodiments are intended to provide guidance to carry out the present invention to a greater extent.
  • Oxazolo[4,5-b]pyridine 600 mg, 5 mmol in 30 ml THF was cooled to 0°C before the addition of isopropanyl magnesium chloride (2M in THF, 2.5 ml, 5 mmol). After stirring for 1 hour at 0°C, (S)-(l-formyl-propyl)-carbamic acid tert-butyl ester (573 mg, 3 mmol) in 20 ml THF was added. The ice bath was removed and the reaction allowed to warm to room temperature. The reaction mixture was stirred for 2 hours and quenched with saturated ammonium chloride solution.
  • the carboxylic acid was isolated by EtOAc extraction of the acidified (pH 1 -2) aqueous phase, then recrystallized from EtOAc and hexane to yield 0.58g of2-cyclohexylmethyl- 4-mo ⁇ holin-4-yl-4-oxo-butyric acid;
  • Tributyltinhydride (2.69mL, lOmmol), AH3N (164mg, 1 mmol), and 1-bromo-l-methyl- cyclopentane (2.4g, 15mmol) were added to a solution of itaconic anhydride (lg, 8.93mmol) in dry benzene (20mL) and heated at reflux for 3 hours. After cooling, the benzene was removed under vacuum and the residue was dissolved in dry dichloromethane (20mL). The solution was cooled to -78°C and mo ⁇ holine (1.5mL) was added dropwise over 2min. The mixture was allowed to warm to room temperature over 2 hours.
  • Dess-Martin Periodinane (15wt% in DCM, 8.8g, 3.1 mmol) was added to a solution of [1- (Benzooxazol-2-yl-hydroxy-methyl)-propyl]-carbamic acid tert-butyl ester (475 mg, 1.55 mmol) in dry methylene chloride (15 ml) and stirred at room temperature for 4 hrs. The reaction was quenched with a solution of Na 2 S 2 O 3 in aqueous NaHCO 3 . The organic layer was separated and the aqueous extracted with dichloromethane. The organic extracts were dried over sodium sulfate and concentrated under reduced pressure.
  • Cinnamyl bromide (1.6g, 7.32 mmol) was then added, the reaction mixture stirred at -78 °C for 2 hrs, warmed up to room temperature and stirred overnight at room temperature.
  • the reaction was quenched with saturated ammonium chloride solution, adjusted the pH to 6 with IN HCl and extracted with ethyl acetate. Combined ethyl acetate extracts were dried over MgSO 4 and concentrated under reduced pressure to give yellow solid. Column chromatography on silica eluting with a mixture of ethyl acetate and methylene chloride gave the title compound as pale yellow solid (1.15 g).
  • Step 1 Triethylborane (1.0 M in THF, 149.5ml, 149.5mmol) was added to oxazole (10.33g, 149.5mmol) and stirred for 45 minutes at room temperature. The mixture was then cooled to -78 ° C and n-BuLi (2.5 M in hexane, 59.8ml, 149.5mmol) was added dropwise and allowed to stir for one hour under nitrogen. Compound (1) (8.0g, 42.7mmol) was dissolved in 25 ml of THF and added to the reaction mixture. The reaction was stirred for 5 hours at -78 ° C then it was allowed to warm to 0 ° C for one hour.
  • reaction mixture was washed with a solution of Na 2 S 2 O 3 in water (0.26M), saturated aqueous bicarbonate solution and water, dried over Na 2 SO 4 and solvent evaporated under reduced pressure.
  • the residue was purified by flash chromatography eluting with a mixture of ethyl acetate and heptane to give 4,4-Dimethyl-2-(2-mo ⁇ holin-4-yl-2- oxo-ethvD-pentanoic acid [ 1 -(5-ethyl- 1.2.4-oxadiazole-3-carbonyl)-propyl]-amide as a yellow solid (44 mg) (mixture of diastereoisomers).
  • Dess-Martin Periodinane (15 wt% in DCM, 0.15mmol, 424mg) was added to a solution of (S)-2-(l-Fluoro-2-mo ⁇ holin-4-yl-2-oxo-ethyl)-5-phenyl-pentanoic acid [1- (benzoxazol-2-yl-hydroxy-methyl)-propyl]-amide (0.074mmol) in dry methylene chloride and stirred for three hours.
  • test compounds in varying concentrations were prepared in 10 ⁇ L of dimethyl sulfoxide (DMSO) and then diluted into assay buffer (40 ⁇ L, comprising: MES, 50 mM (pH 6.5);
  • test compounds in varying concentrations were prepared in 10 ⁇ L of dimethyl sulfoxide (DMSO) and then diluted into assay buffer (40 ⁇ L, comprising: NN-bis(2- hydroxyethyl)-2-aminoethanesulfonic acid (BES), 50 mM (pH 6); polyoxyethylenesorbitan monolaurate, 0.05%; and dithiothreitol (DTT), 2.5 mM).
  • BES NN-bis(2- hydroxyethyl)-2-aminoethanesulfonic acid
  • PEG 6 polyoxyethylenesorbitan monolaurate
  • DTT dithiothreitol
  • Human cathepsin B 0.025 pMoles in 25 ⁇ L of assay buffer was added to the dilutions.
  • the assay solutions were mixed for 5-10 seconds on a shaker plate, covered and incubated for 30 minutes at ambient temperature.
  • test compounds in varying concentrations were prepared in 10 VL of dimethyl sulfoxide (DMSO) and then diluted into assay buffer (40 ⁇ L, comprising: MES, 50 mM (pH 5.5); EDTA, 2.5 mM; and DTT, 2.5 mM).
  • assay buffer 40 ⁇ L, comprising: MES, 50 mM (pH 5.5); EDTA, 2.5 mM; and DTT, 2.5 mM).
  • Human cathepsin K (0.0906 pMoles in 25 ⁇ L of assay buffer) was added to the dilutions.
  • the assay solutions were mixed for 5-10 seconds on a shaker plate, covered and incubated for 30 minutes at ambient temperature.
  • Z-Phe-Arg-AMC (4 nMoles in 25 ⁇ L of assay buffer) was added to the assay solutions and hydrolysis was followed spectrophotometrically at ( ⁇ 460 nm) for 5 minutes. Apparent inhibition constants (Kj) were calculated from the enzyme progress curves using standard mathematical models.
  • test compounds in varying concentrations were prepared in 10 ⁇ L of dimethyl sulfoxide (DMSO) and then diluted into assay buffer (40 ⁇ L, comprising: MES, 50 mM (pH 5.5); EDTA, 2.5 mM; and DTT, 2.5 mM).
  • assay buffer 40 ⁇ L, comprising: MES, 50 mM (pH 5.5); EDTA, 2.5 mM; and DTT, 2.5 mM).
  • Human cathepsin L (0.05 pMoles in 25 ⁇ L of assay buffer) was added to the dilutions.
  • the assay solutions were mixed for 5-10 seconds on a shaker plate, covered and incubated for 30 minutes at ambient temperature.
  • Citric Acid Monohydrate 1.05 mg Sodium Hydroxide 0.18 mg

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Abstract

La présente invention concerne de nouveaux inhibiteurs de cathepsine S, leurs sels et N-oxydes pharmaceutiquement acceptables, leurs utilisations en tant qu'agents thérapeutiques et leurs procédés de production.
PCT/US2003/019960 2002-06-26 2003-06-25 Derives de morpholine et de tetrahydropyrane et leur utilisation en tant qu'inhibiteurs de cathepsine Ceased WO2004002491A1 (fr)

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AU2003245668A AU2003245668A1 (en) 2002-06-26 2003-06-25 Morpholine and tetrahydropyran drivatives and their use as cathepsin inhibitors
CA002488525A CA2488525A1 (fr) 2002-06-26 2003-06-25 Derives de morpholine et de tetrahydropyrane et leur utilisation en tant qu'inhibiteurs de cathepsine
JP2004517794A JP2006512289A (ja) 2002-06-26 2003-06-25 モルホリン及びテトロヒドロピラン誘導体並びにカテプシン阻害物質としてのそれらの使用
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AU2003245668A1 (en) 2004-01-19
US20060089357A1 (en) 2006-04-27
US7030116B2 (en) 2006-04-18
JP2006512289A (ja) 2006-04-13
AU2003245668A8 (en) 2004-01-19
WO2004002491A8 (fr) 2005-02-17
US20030105099A1 (en) 2003-06-05
EP1515726A1 (fr) 2005-03-23

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